Horrific murder of a mother and her two autistic children by their father who gassed them and himself along with the family dog

Harrowing details have emerged of the moment police were confronted with the bodies of a family-of-four and their dog killed in a horrific murder-suicide.

Fernando Manrique, wife Maria Lutz and their autistic children – Elisa, 11, and Martin, 10 – were found poisoned to death by carbon monoxide inside the Davidson house on Sydney’s Northern Beaches on October 18, The Sydney Morning Herald reported.

Police were called to the home after Ms Lutz, originally from Colombia, did not show up to work at the canteen at St Lucy’s School in Wahroonga and the children did not arrive for school.